OpenGTS (Open Source GPS Tracking System) is a full featured web-based GPS tracking system for your fleet of vehicles. It supports OpenLayers and other map providers, detail/summary Reporting, and various GPS tracking devices.

A Java interface and implementation for the W3C Web Ontology Language (OWL), used to represent Semantic Web ontologies. The API is focused towards OWL 2 and offers an interface to inference engines and validation functionality.

Fedora Commons provides open-source software to ensure durability and integrity of digital content, use semantics to contextualize and inter-relate content from many sources, and to enable the creation of innovative, collaborative information spaces.

OpenCyc is the open source version of the Cyc(r) technology, the world's largest and most complete general knowledge base and reasoning engine. A new release with even more content, better performance, and improved reliability will be up shortly.

Jena is Java toolkit for developing semantic web applications based on W3C recommendations for RDF and OWL. It provides an RDF API; ARP, an RDF parser; SPARQL, the W3C RDF query language; an OWL API; and rule-based inference for RDFS and OWL.
Jena is now an Apache project:
http://jena.apache.org/

jFuzzyLogic is a java implementation of a Fuzzy Logic software package. It implements a complete Fuzzy inference system (FIS) as well as Fuzzy Control Logic compliance (FCL) according to IEC 61131-7 (formerly 1131-7).

[The source code has been migrated and is now hosted on Github: https://github.com/jenetics/jenetics]
Jenetics is an Genetic Algorithm, respectively an Evolutionary Algorithm, library written in Java. It is designed with a clear separation of the several concepts of the algorithm, e.g. Gene, Chromosome, Genotype, Phenotype, Population and fitness Function. Jenetics allows you to minimize and maximize the given fitness function without tweaking it. In contrast to other GA implementations, the library uses the concept of an evolution stream (EvolutionStream) for executing the evolution steps. Since the EvolutionStream implements the Java Stream interface, it works smoothly with the rest of the Java Stream API.
Other repositories:
- https://github.com/jenetics/jenetics
Maven:
- http://search.maven.org/#search|ga|1|a%3A%22org.jenetics%22

This ohnlp project has released "pipelines" that were contributed by members of the OHNLP Consortium. The pipelines are based on the Apache UIMA framework.
medKAT/P, MedCoref, MedTagger, MedXN, and cTAKES are licensed under Apache License V2.0.
MedTime is licensed under GNU General Public License version 3.0 (GPLv3).
cTAKES development has moved to apache.org.
See http://ctakes.apache.org/

The DaCapo benchmark suite is designed to faciliate performance analysis of Java Virtual Machines, compilers and memory management. It comprises a harness and a suite of open source real-world programs.

Modelio-Open is a project hosting a set of open source extensions (SoaML, SysML and UML Testing Profile) for a previous version (1.2) of the Modelio Free tool .
Currently, the lastest version (2.x) of Modelio modeling and generation tool is available at http://modelio.org/downloads/download-modelio.html. All extensions are downloadable at http://forge.modelio.org/projects.

Open HLA (oh-la) provides an open-source implementation of the HLA RTI spec 1.3, IEEE 1516 and IEEE 1516 Evolved. It also provides a framework to wrap the standard RTI classes and FOM to code generation to make life simpler.

The Helsinki Finite-State Transducer toolkit is intended for processing natural language morphologies. The toolkit is demonstrated by wide-coverage implementations of a number of languages of varying morphological complexity.